diff --git a/app/src/main/java/org/solovyev/android/calculator/preferences/NumberFormatPreference.java b/app/src/main/java/org/solovyev/android/calculator/preferences/NumberFormatPreference.java
index f921f8a6..a7424ae4 100644
--- a/app/src/main/java/org/solovyev/android/calculator/preferences/NumberFormatPreference.java
+++ b/app/src/main/java/org/solovyev/android/calculator/preferences/NumberFormatPreference.java
@@ -21,6 +21,7 @@ import org.solovyev.common.NumberFormatter;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
+import jscl.JsclMathEngine;
 
 import static org.solovyev.android.calculator.Engine.Preferences.Output;
 
diff --git a/jscl/src/test/java/jscl/JsclMathEngineTest.java b/jscl/src/test/java/jscl/JsclMathEngineTest.java
index d2e3583f..9f35aa77 100644
--- a/jscl/src/test/java/jscl/JsclMathEngineTest.java
+++ b/jscl/src/test/java/jscl/JsclMathEngineTest.java
@@ -6,6 +6,8 @@ import org.solovyev.common.NumberFormatter;
 
 import midpcalc.Real;
 
+import midpcalc.Real;
+
 import static org.junit.Assert.assertEquals;
 
 /**